A PO BOX number can be less than or more than four digit. For post office boxes, the general rule is that each box has its own ZIP+4 code.
The last four digit is often one of the following:
1. Zero plus the last three digits of the box number (eg. PO BOX 1001, Los Angeles CA 90001-0001).
2. The last four digits of the box number (eg. PO BOX 9991, Twin Peaks CA 92391-9991).
3. If the box number is less than four digits, enough zeros prepended to the front of the box number to produce a four-digit number(eg. PO BOX 1, Shreveport LA 71161-0001).
However, there is no uniform rule, the zip code plus four is for reference only, the ZIP+4 code must be looked up individually for each box in the USPS offical website.
PO BOX 782700, PHILADELPHIA, PA 19178-2700
PO BOX 782701, PHILADELPHIA, PA 19178-2701
PO BOX 782702, PHILADELPHIA, PA 19178-2702
PO BOX 782703, PHILADELPHIA, PA 19178-2703
PO BOX 782704, PHILADELPHIA, PA 19178-2704
PO BOX 782705, PHILADELPHIA, PA 19178-2705
PO BOX 782706, PHILADELPHIA, PA 19178-2706
PO BOX 782707, PHILADELPHIA, PA 19178-2707
PO BOX 782708, PHILADELPHIA, PA 19178-2708
PO BOX 782709, PHILADELPHIA, PA 19178-2709
PO BOX 782710, PHILADELPHIA, PA 19178-2710
PO BOX 782711, PHILADELPHIA, PA 19178-2711
PO BOX 782712, PHILADELPHIA, PA 19178-2712
PO BOX 782713, PHILADELPHIA, PA 19178-2713
PO BOX 782714, PHILADELPHIA, PA 19178-2714
PO BOX 782715, PHILADELPHIA, PA 19178-2715
PO BOX 782716, PHILADELPHIA, PA 19178-2716
PO BOX 782717, PHILADELPHIA, PA 19178-2717
PO BOX 782718, PHILADELPHIA, PA 19178-2718
PO BOX 782719, PHILADELPHIA, PA 19178-2719
PO BOX 782720, PHILADELPHIA, PA 19178-2720
PO BOX 782721, PHILADELPHIA, PA 19178-2721
PO BOX 782722, PHILADELPHIA, PA 19178-2722
PO BOX 782723, PHILADELPHIA, PA 19178-2723
PO BOX 782724, PHILADELPHIA, PA 19178-2724
PO BOX 782725, PHILADELPHIA, PA 19178-2725
PO BOX 782726, PHILADELPHIA, PA 19178-2726
PO BOX 782727, PHILADELPHIA, PA 19178-2727
PO BOX 782728, PHILADELPHIA, PA 19178-2728
PO BOX 782729, PHILADELPHIA, PA 19178-2729
PO BOX 782730, PHILADELPHIA, PA 19178-2730
PO BOX 782731, PHILADELPHIA, PA 19178-2731
PO BOX 782732, PHILADELPHIA, PA 19178-2732
PO BOX 782733, PHILADELPHIA, PA 19178-2733
PO BOX 782734, PHILADELPHIA, PA 19178-2734
PO BOX 782735, PHILADELPHIA, PA 19178-2735
PO BOX 782736, PHILADELPHIA, PA 19178-2736
PO BOX 782737, PHILADELPHIA, PA 19178-2737
PO BOX 782738, PHILADELPHIA, PA 19178-2738
PO BOX 782739, PHILADELPHIA, PA 19178-2739
PO BOX 782740, PHILADELPHIA, PA 19178-2740
PO BOX 782741, PHILADELPHIA, PA 19178-2741
PO BOX 782742, PHILADELPHIA, PA 19178-2742
PO BOX 782743, PHILADELPHIA, PA 19178-2743
PO BOX 782744, PHILADELPHIA, PA 19178-2744
PO BOX 782745, PHILADELPHIA, PA 19178-2745
PO BOX 782746, PHILADELPHIA, PA 19178-2746
PO BOX 782747, PHILADELPHIA, PA 19178-2747
PO BOX 782748, PHILADELPHIA, PA 19178-2748
PO BOX 782749, PHILADELPHIA, PA 19178-2749
PO BOX 782750, PHILADELPHIA, PA 19178-2750
PO BOX 782751, PHILADELPHIA, PA 19178-2751
PO BOX 782752, PHILADELPHIA, PA 19178-2752
PO BOX 782753, PHILADELPHIA, PA 19178-2753
PO BOX 782754, PHILADELPHIA, PA 19178-2754
PO BOX 782755, PHILADELPHIA, PA 19178-2755
PO BOX 782756, PHILADELPHIA, PA 19178-2756
PO BOX 782757, PHILADELPHIA, PA 19178-2757
PO BOX 782758, PHILADELPHIA, PA 19178-2758
PO BOX 782759, PHILADELPHIA, PA 19178-2759
PO BOX 782760, PHILADELPHIA, PA 19178-2760
PO BOX 782761, PHILADELPHIA, PA 19178-2761
PO BOX 782762, PHILADELPHIA, PA 19178-2762
PO BOX 782763, PHILADELPHIA, PA 19178-2763
PO BOX 782764, PHILADELPHIA, PA 19178-2764
PO BOX 782765, PHILADELPHIA, PA 19178-2765
PO BOX 782766, PHILADELPHIA, PA 19178-2766
PO BOX 782767, PHILADELPHIA, PA 19178-2767
PO BOX 782768, PHILADELPHIA, PA 19178-2768
PO BOX 782769, PHILADELPHIA, PA 19178-2769
PO BOX 782770, PHILADELPHIA, PA 19178-2770
PO BOX 782771, PHILADELPHIA, PA 19178-2771
PO BOX 782772, PHILADELPHIA, PA 19178-2772
PO BOX 782773, PHILADELPHIA, PA 19178-2773
PO BOX 782774, PHILADELPHIA, PA 19178-2774
PO BOX 782775, PHILADELPHIA, PA 19178-2775
PO BOX 782776, PHILADELPHIA, PA 19178-2776
PO BOX 782777, PHILADELPHIA, PA 19178-2777
PO BOX 782778, PHILADELPHIA, PA 19178-2778
PO BOX 782779, PHILADELPHIA, PA 19178-2779
PO BOX 782780, PHILADELPHIA, PA 19178-2780
PO BOX 782781, PHILADELPHIA, PA 19178-2781
PO BOX 782782, PHILADELPHIA, PA 19178-2782
PO BOX 782783, PHILADELPHIA, PA 19178-2783
PO BOX 782784, PHILADELPHIA, PA 19178-2784
PO BOX 782785, PHILADELPHIA, PA 19178-2785
PO BOX 782786, PHILADELPHIA, PA 19178-2786
PO BOX 782787, PHILADELPHIA, PA 19178-2787
PO BOX 782788, PHILADELPHIA, PA 19178-2788
PO BOX 782789, PHILADELPHIA, PA 19178-2789
PO BOX 782790, PHILADELPHIA, PA 19178-2790
PO BOX 782791, PHILADELPHIA, PA 19178-2791
PO BOX 782792, PHILADELPHIA, PA 19178-2792
PO BOX 782793, PHILADELPHIA, PA 19178-2793
PO BOX 782794, PHILADELPHIA, PA 19178-2794
PO BOX 782795, PHILADELPHIA, PA 19178-2795
PO BOX 782796, PHILADELPHIA, PA 19178-2796
PO BOX 782797, PHILADELPHIA, PA 19178-2797
PO BOX 782798, PHILADELPHIA, PA 19178-2798
PO BOX 782799, PHILADELPHIA, PA 19178-2799
PO BOX 782800, PHILADELPHIA, PA 19178-2800
PO BOX 782801, PHILADELPHIA, PA 19178-2801
PO BOX 782802, PHILADELPHIA, PA 19178-2802
PO BOX 782803, PHILADELPHIA, PA 19178-2803
PO BOX 782804, PHILADELPHIA, PA 19178-2804
PO BOX 782805, PHILADELPHIA, PA 19178-2805
PO BOX 782806, PHILADELPHIA, PA 19178-2806
PO BOX 782807, PHILADELPHIA, PA 19178-2807
PO BOX 782808, PHILADELPHIA, PA 19178-2808
PO BOX 782809, PHILADELPHIA, PA 19178-2809
PO BOX 782810, PHILADELPHIA, PA 19178-2810
PO BOX 782811, PHILADELPHIA, PA 19178-2811
PO BOX 782812, PHILADELPHIA, PA 19178-2812
PO BOX 782813, PHILADELPHIA, PA 19178-2813
PO BOX 782814, PHILADELPHIA, PA 19178-2814
PO BOX 782815, PHILADELPHIA, PA 19178-2815
PO BOX 782816, PHILADELPHIA, PA 19178-2816
PO BOX 782817, PHILADELPHIA, PA 19178-2817
PO BOX 782818, PHILADELPHIA, PA 19178-2818
PO BOX 782819, PHILADELPHIA, PA 19178-2819
PO BOX 782820, PHILADELPHIA, PA 19178-2820
PO BOX 782821, PHILADELPHIA, PA 19178-2821
PO BOX 782822, PHILADELPHIA, PA 19178-2822
PO BOX 782823, PHILADELPHIA, PA 19178-2823
PO BOX 782824, PHILADELPHIA, PA 19178-2824
PO BOX 782825, PHILADELPHIA, PA 19178-2825
PO BOX 782826, PHILADELPHIA, PA 19178-2826
PO BOX 782827, PHILADELPHIA, PA 19178-2827
PO BOX 782828, PHILADELPHIA, PA 19178-2828
PO BOX 782829, PHILADELPHIA, PA 19178-2829
PO BOX 782830, PHILADELPHIA, PA 19178-2830
PO BOX 782831, PHILADELPHIA, PA 19178-2831
PO BOX 782832, PHILADELPHIA, PA 19178-2832
PO BOX 782833, PHILADELPHIA, PA 19178-2833
PO BOX 782834, PHILADELPHIA, PA 19178-2834
PO BOX 782835, PHILADELPHIA, PA 19178-2835
PO BOX 782836, PHILADELPHIA, PA 19178-2836
PO BOX 782837, PHILADELPHIA, PA 19178-2837
PO BOX 782838, PHILADELPHIA, PA 19178-2838
PO BOX 782839, PHILADELPHIA, PA 19178-2839
PO BOX 782840, PHILADELPHIA, PA 19178-2840
PO BOX 782841, PHILADELPHIA, PA 19178-2841
PO BOX 782842, PHILADELPHIA, PA 19178-2842
PO BOX 782843, PHILADELPHIA, PA 19178-2843
PO BOX 782844, PHILADELPHIA, PA 19178-2844
PO BOX 782845, PHILADELPHIA, PA 19178-2845
PO BOX 782846, PHILADELPHIA, PA 19178-2846
PO BOX 782847, PHILADELPHIA, PA 19178-2847
PO BOX 782848, PHILADELPHIA, PA 19178-2848
PO BOX 782849, PHILADELPHIA, PA 19178-2849
PO BOX 782850, PHILADELPHIA, PA 19178-2850
PO BOX 782851, PHILADELPHIA, PA 19178-2851
PO BOX 782852, PHILADELPHIA, PA 19178-2852
PO BOX 782853, PHILADELPHIA, PA 19178-2853
PO BOX 782854, PHILADELPHIA, PA 19178-2854
PO BOX 782855, PHILADELPHIA, PA 19178-2855
PO BOX 782856, PHILADELPHIA, PA 19178-2856
PO BOX 782857, PHILADELPHIA, PA 19178-2857
PO BOX 782858, PHILADELPHIA, PA 19178-2858
PO BOX 782859, PHILADELPHIA, PA 19178-2859
PO BOX 782860, PHILADELPHIA, PA 19178-2860
PO BOX 782861, PHILADELPHIA, PA 19178-2861
PO BOX 782862, PHILADELPHIA, PA 19178-2862
PO BOX 782863, PHILADELPHIA, PA 19178-2863
PO BOX 782864, PHILADELPHIA, PA 19178-2864
PO BOX 782865, PHILADELPHIA, PA 19178-2865
PO BOX 782866, PHILADELPHIA, PA 19178-2866
PO BOX 782867, PHILADELPHIA, PA 19178-2867
PO BOX 782868, PHILADELPHIA, PA 19178-2868
PO BOX 782869, PHILADELPHIA, PA 19178-2869
PO BOX 782870, PHILADELPHIA, PA 19178-2870
PO BOX 782871, PHILADELPHIA, PA 19178-2871
PO BOX 782872, PHILADELPHIA, PA 19178-2872
PO BOX 782873, PHILADELPHIA, PA 19178-2873
PO BOX 782874, PHILADELPHIA, PA 19178-2874
PO BOX 782875, PHILADELPHIA, PA 19178-2875
PO BOX 782876, PHILADELPHIA, PA 19178-2876
PO BOX 782877, PHILADELPHIA, PA 19178-2877
PO BOX 782878, PHILADELPHIA, PA 19178-2878
PO BOX 782879, PHILADELPHIA, PA 19178-2879
PO BOX 782880, PHILADELPHIA, PA 19178-2880
PO BOX 782881, PHILADELPHIA, PA 19178-2881
PO BOX 782882, PHILADELPHIA, PA 19178-2882
PO BOX 782883, PHILADELPHIA, PA 19178-2883
PO BOX 782884, PHILADELPHIA, PA 19178-2884
PO BOX 782885, PHILADELPHIA, PA 19178-2885
PO BOX 782886, PHILADELPHIA, PA 19178-2886
PO BOX 782887, PHILADELPHIA, PA 19178-2887
PO BOX 782888, PHILADELPHIA, PA 19178-2888
PO BOX 782889, PHILADELPHIA, PA 19178-2889
PO BOX 782890, PHILADELPHIA, PA 19178-2890
PO BOX 782891, PHILADELPHIA, PA 19178-2891
PO BOX 782892, PHILADELPHIA, PA 19178-2892
PO BOX 782893, PHILADELPHIA, PA 19178-2893
PO BOX 782894, PHILADELPHIA, PA 19178-2894
PO BOX 782895, PHILADELPHIA, PA 19178-2895
PO BOX 782896, PHILADELPHIA, PA 19178-2896
PO BOX 782897, PHILADELPHIA, PA 19178-2897
PO BOX 782898, PHILADELPHIA, PA 19178-2898
PO BOX 782899, PHILADELPHIA, PA 19178-2899
PO BOX 782900, PHILADELPHIA, PA 19178-2900
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